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Colt1911 [192]
4 years ago
10

If 2x - 5 = 11. what is 3x?

Mathematics
2 answers:
Anna71 [15]4 years ago
4 0

Answer:

24

Step-by-step explanation:

add 5 to both sides to get 2x=16

divide both sides by 2

x=8

3(8)=24

barxatty [35]4 years ago
3 0

Answer:

3x = 24  

Step-by-step explanation:

x = 8  2(8)= 16 16-5 = 11  so 8 x 3 = 24

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2x^2+y^2=8xy find dy/dx
miskamm [114]

Answer:

2(x-2y)/(4x-y)  =  dy/dx

Step-by-step explanation:

2x^2+y^2=8xy

Take the derivative of each term, remembering that we take the 8xy as derivative by parts)

2 * 2x dx +  *2y dy = 8 ( x dy + dx *y)

4x dx +2y dy = 8x dy + 8y dx

Subtract 2y dy from each side

4x dx +2y dy -4y dy = 8x dy - 2y dy + 8y dx

4x dx  = 8x dy - 2y dy + 8y dx

Subtract 8y dx from each side

4x dx -8y dx  = 8x dy - 2y dy + 8y dx-8y dx

4x dx -8y dx  = 8x dy - 2y dy

(4x-8y) dx = (8x-2y) dy

Factor out a 4 from the left side and a 2 from the right side

4(x-2y) dx = 2( 4x-y) dy

Cancel a 2

2(x-2y) dx = ( 4x-y) dy

Divide each side by (4x-y)

2(x-2y)/(4x-y) dx = ( 4x-y)/(4x-y) dy

2(x-2y)/(4x-y) dx =  dy

Divide by dx

2(x-2y)/(4x-y) dx/dx =  dy/dx

2(x-2y)/(4x-y)  =  dy/dx

7 0
3 years ago
Solve for x.<br> 5x – 7 = 8x – 4
hammer [34]

Answer:

x =-1

Step-by-step explanation:

5x- 7 = 8x - 4\\\\\mathrm{Add\:}7\mathrm{\:to\:both\:sides}\\5x-7+7=8x-4+7\\\\Simplify\\5x=8x+3\\\\\mathrm{Subtract\:}8x\mathrm{\:from\:both\:sides}\\5x-8x=8x+3-8x\\\\Simplify\\-3x =3\\\\\mathrm{Divide\:both\:sides\:by\:}-3\\\frac{-3x}{-3}=\frac{3}{-3}\\\\Simplify\\x=-1

3 0
4 years ago
Read 2 more answers
Find the value of 9w + 1 given that -5w -5 = 5
vredina [299]

Answer:

-17

Step-by-step explanation:

First, let's see what the value of w is, by solving -5w - 5 = 5.

-5w - 5 = 5            Add 5 on both sides.

-5w = 10                Divide -5 on both sides.

w = -2

Now, we know that w is equal to -2, let's plug it in to find the value.

9(-2) + 1                 Distribute.

-18 + 1                    Add.

-17

5 0
3 years ago
I am solely here to brag!
Arada [10]

Answer:

That's wonderful!

Step-by-step explanation:

I'm really proud of you! I'm 14 (almost 15), and taking sophomore classes right now, and a foreign language. I absolutely regret not taking a second math class this year (Algebra II).

5 0
3 years ago
The square root of 9 times x to the 6th power​
ololo11 [35]

Answer:

531,441

Step-by-step explanation:

9 x 9 x 9 x 9 x 9 x 9 = 531,441

5 0
3 years ago
Read 2 more answers
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